This article is about physics term. For the Bright Eyes album, see Noise Floor (Rarities: 1998-2005).
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Noise floor" – news · newspapers · books · scholar · JSTOR(June 2009) (Learn how and when to remove this message)
Measurement from a spectrum analyzer showing a noise-like measurement from an unspecified component.
In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is defined as any signal other than the one being monitored.
In radio communication and electronics, this may include thermal noise, black body, cosmic noise as well as atmospheric noise from distant thunderstorms and similar and any other unwanted man-made signals, sometimes referred to as incidental noise. If the dominant noise is generated within the measuring equipment (for example by a receiver with a poor noise figure) then this is an example of an instrumentation noise floor, as opposed to a physical noise floor. These terms are not always clearly defined, and are sometimes confused.[1]
Avoiding interference between electrical systems is the distinct subject of electromagnetic compatibility (EMC).
In a measurement system such as a seismograph, the physical noise floor may be set by the incidental noise, and may include nearby foot traffic or a nearby road. The noise floor limits the smallest measurement that can be taken with certainty since any measured amplitude can on average be no less than the noise floor.
A common way to lower the noise floor in electronics systems is to cool the system to reduce thermal noise, when this is the major noise source. In special circumstances, the noise floor can also be artificially lowered with digital signal processing techniques.
Signals that are below the noise floor can be detected by using different techniques of spread spectrum communications, where signal of a particular information bandwidth is deliberately spread in the frequency domain resulting in a signal with a wider occupied bandwidth.
Every additional 6.02 dB of noise floor corresponds to a 1-bit reduction of the effective number of bits of an analog-to-digital converter or digital-to-analog converter.
^"Notes on the RSGB Observations of the HF Ambient Noise Floor" (PDF). Radio Society of Great Britain. Retrieved 2014-02-03.
noisefloor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is...
NoiseFloor may refer to: Noisefloor, a term in signal measurement NoiseFloor (Rarities: 1998–2005), an album by Bright Eyes NoiseFloor (Spock's Beard...
Active noise control (ANC), also known as noise cancellation (NC), or active noise reduction (ANR), is a method for reducing unwanted sound by the addition...
carrier's noisefloor. In practice, however, this is often improperly simplified to deciding to make the modifications to the carrier resemble white noise as...
phase-noise floor of a DDS is determined by the power sum of the DAC quantization noisefloor and the reference clock phase noisefloor. Crystal oscillator...
while also changing the measured noisefloor. Decreasing the bandwidth of an RBW filter decreases the measured noisefloor and vice versa. This is due to...
the band Bright Eyes. The list totals 212 songs. "Act of Contrition" (NoiseFloor (Rarities: 1998–2005), 2006) "All of the Truth" (A Collection of Songs...
other man-made sources tend to be above the thermal noisefloor in the receiver's circuits. These noises are often referred to as static. Conversely, at very...
Image noise is random variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the image...
Pink noise, 1⁄f noise, fractional noise or fractal noise is a signal or process with a frequency spectrum such that the power spectral density (power...
increasing the distance between source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping...
greater than the noisefloor. To actually detect the signal, however, it is often required to be at a power level greater than the noisefloor by an amount...
range. The noisefloor, however, is spread throughout the entire non-aliased frequency range below the Nyquist frequency of 1.4112 MHz. Noise shaping is...
Noise pollution, or sound pollution, is the propagation of noise or sound with ranging impacts on the activity of human or animal life, most of which are...
a random noise component (or is just random noise). A graph of the power spectrum, averaged over time, typically reveals a flat noisefloor, caused by...
exceed the noisefloor and cannot be detected. Detection requires a signal that exceeds the noisefloor by at least the signal-to-noise ratio. Noise typically...
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort...
this case, the final noisefloor is the sum of the flat dither spectrum and the shaped quantization noise. While real-world noise shaping usually includes...
being typically defined by the 'noisefloor'. In the image sensor literature, the noisefloor is taken as the readout noise, so D R = Q max / σ readout {\displaystyle...
Quiet on the NoiseFloor is the fourth studio album by American musician Jason Falkner, released in Japan on September 2, 2009 on Noise McCartney Records...
A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants...
uniform SNR, the quantization noise level is always of a certain proportion to the signal level. A floating-point noisefloor rises as the signal rises and...
clipping. Multiple noise processes determine the noisefloor of a system. Noise can be picked up from microphone self-noise, preamp noise, wiring and interconnection...
Global Information
